Reactive Power Optimization in Electricity Market for Distribution Network
... (2) Use the two criteria to calculate the optimal location of fixed compensation li* and capacitive current I*ci in the line when excluding capacitor price (Kc=0). (3) Obtain the optimal fixed capacity I*cf1, the optimal switching capacity I*cs1 and the running time T*s of capacitors banks which clo ...
... (2) Use the two criteria to calculate the optimal location of fixed compensation li* and capacitive current I*ci in the line when excluding capacitor price (Kc=0). (3) Obtain the optimal fixed capacity I*cf1, the optimal switching capacity I*cs1 and the running time T*s of capacitors banks which clo ...
Power Factor Improvement of Induction Motor by Using Capacitors
... Reactive loads such as inductors and capacitors make up what is called reactive power. The linear combination of true power and reactive power is called apparent power. Power system loads consist of resistive, inductive, and capacitive loads. Examples of resistive loads are incandescent lighting and ...
... Reactive loads such as inductors and capacitors make up what is called reactive power. The linear combination of true power and reactive power is called apparent power. Power system loads consist of resistive, inductive, and capacitive loads. Examples of resistive loads are incandescent lighting and ...
“Fuzzy Logic Speed Controllers Using FPGA Technique For Three
... Course description These converters can change and regulate the voltage, current, or power; dc-dc converters, ac-dc uncontrolled and phase controlled rectifier circuits, dc-ac inverters, and ac-ac cycloconverters. Applications include electronic Switching power supplies, motors, heaters system, and ...
... Course description These converters can change and regulate the voltage, current, or power; dc-dc converters, ac-dc uncontrolled and phase controlled rectifier circuits, dc-ac inverters, and ac-ac cycloconverters. Applications include electronic Switching power supplies, motors, heaters system, and ...
War of Currents
... voltage drop in the wires between the generator and load. The voltage level was chosen for convenience in lamp manufacture; high-resistance carbon filament lamps could be constructed to withstand 100 volts, and to provide lighting performance economically competitive with gas lighting. At the time i ...
... voltage drop in the wires between the generator and load. The voltage level was chosen for convenience in lamp manufacture; high-resistance carbon filament lamps could be constructed to withstand 100 volts, and to provide lighting performance economically competitive with gas lighting. At the time i ...
phase shift - Controlled Power Company
... PHASE SHIFT General Lenze’s law states: “An induced electromotive force (EMF) always has such a direction as to oppose the action that produces it.” Restated: “When a current in an inductive circuit is increasing, the induced EMF opposes the applied voltage and tends to keep the current from increas ...
... PHASE SHIFT General Lenze’s law states: “An induced electromotive force (EMF) always has such a direction as to oppose the action that produces it.” Restated: “When a current in an inductive circuit is increasing, the induced EMF opposes the applied voltage and tends to keep the current from increas ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... STATCOM consist of a inverter made up of IGBT or GTO acting as self commutated switches , a DC voltage source an interconnecting transformer, and controller which controls the switching time of various switches in inverter legs. The STATCOM is capable of generating continuously variable inductive or ...
... STATCOM consist of a inverter made up of IGBT or GTO acting as self commutated switches , a DC voltage source an interconnecting transformer, and controller which controls the switching time of various switches in inverter legs. The STATCOM is capable of generating continuously variable inductive or ...
WLCM Nighttime Array at Holt, MI - Munn
... Inc. for the design and tune up of is new nighttime facility at Holt, MI. The new 4 tower directional array provided a large power increase from the previously allowed 70 watts nighttime to the new 4.5 kW of nighttime coverage over Lansing, MI. The new phasor was designed and built by Kintronic Labs ...
... Inc. for the design and tune up of is new nighttime facility at Holt, MI. The new 4 tower directional array provided a large power increase from the previously allowed 70 watts nighttime to the new 4.5 kW of nighttime coverage over Lansing, MI. The new phasor was designed and built by Kintronic Labs ...
Innovative CPU Power Controller Architecture Enables Significant
... PWM controllers today typically use single-edge (leading-edge or trailing-edge) modulation, both of which have a one-cycle delay when responding to a large-step current increase. ON Semiconductor’s new dual-edge modulation PWM controller, the NCP5381, enables all power phases to respond to a large-s ...
... PWM controllers today typically use single-edge (leading-edge or trailing-edge) modulation, both of which have a one-cycle delay when responding to a large-step current increase. ON Semiconductor’s new dual-edge modulation PWM controller, the NCP5381, enables all power phases to respond to a large-s ...
to application (Word DOC)
... Connection Impact Assessment Application Form Grimsby Power Distribution System This Application Form is for Generators applying for Connection Impact Assessment (“CIA”) on the Grimsby Power Distribution System for generation projects > 10 kW. It is important that the Generator provides all of the i ...
... Connection Impact Assessment Application Form Grimsby Power Distribution System This Application Form is for Generators applying for Connection Impact Assessment (“CIA”) on the Grimsby Power Distribution System for generation projects > 10 kW. It is important that the Generator provides all of the i ...
UPS (Uninterruptible Power Supplies)
... magnetic components (inductors, transformers) Inverter interacts with magnetic components to boost or buck input voltage Provides some power conditioning but frequency variations are passed to load Typically 100 kVA or less, 1- or 3-phase ...
... magnetic components (inductors, transformers) Inverter interacts with magnetic components to boost or buck input voltage Provides some power conditioning but frequency variations are passed to load Typically 100 kVA or less, 1- or 3-phase ...
vertical power strips
... features are critical with unconditioned line power. Select models also have a built in current meter with a digital display that shows the amount of current on the power strip. This feature assists with power management by allowing the user to judge the remaining capacity on the power strip before ...
... features are critical with unconditioned line power. Select models also have a built in current meter with a digital display that shows the amount of current on the power strip. This feature assists with power management by allowing the user to judge the remaining capacity on the power strip before ...
Paper - Doble Engineering
... will react with copper to form deposits in the paper insulation and the tendency of some oils to become corrosive with time and temperature. To date, oil tests can only provide information about the characteristics of the oil itself and not if the windings of the transformer have been compromised in ...
... will react with copper to form deposits in the paper insulation and the tendency of some oils to become corrosive with time and temperature. To date, oil tests can only provide information about the characteristics of the oil itself and not if the windings of the transformer have been compromised in ...
... Harmonic problems are almost always introduced by the consumers’ equipment and installation practices. Harmonic distortion is caused by the high use of nonlinear load equipment such as computer power supplies, electronic ballasts, compact fluorescent lamps and variable speed drives etc., which creat ...
Power factor
In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless number in the closed interval of -1 to 1. A power factor of less than one means that the voltage and current waveforms are not in phase, reducing the instantaneous product of the two waveforms (V x I). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a non-linear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power. A negative power factor occurs when the device (which is normally the load) generates power, which then flows back towards the source, which is normally considered the generator.In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment. Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.Linear loads with low power factor (such as induction motors) can be corrected with a passive network of capacitors or inductors. Non-linear loads, such as rectifiers, distort the current drawn from the system. In such cases, active or passive power factor correction may be used to counteract the distortion and raise the power factor. The devices for correction of the power factor may be at a central substation, spread out over a distribution system, or built into power-consuming equipment.